EN
29
wires of the two electric animal fences shall be at least 2.5 m. If this
gap is to be closed, this shall be affected by means of electrically
nonconductive material or an isolated metal barrier.
•
Barbed wire or razor wire MUST NOT be electrified by an energiser.
•
A distance of at least 10 m shall be maintained between the energiser
earth electrode and any other earthing system connected parts such
as the power supply system protective earth or the telecommunication
system earth.
•
Connecting leads that are run inside buildings shall be effectively
insulated from the earthed structural parts of the building. This may be
achieved by using insulated high voltage cable.
•
Connecting leads that are run underground shall be run in conduit of
insulating material or else insulated high voltage cable shall be used.
Care must be taken to avoid damage to the connecting leads due to
the effects of animal hooves or tractor wheels sinking into the ground.
•
Connecting leads shall not be installed in the same conduit as the
mains supply wiring, communication cables or data cables.
•
Connecting leads and electric fence wires shall not cross above
overhead power or communication lines.
•
If an electric fence must be installed under or near overhead power
lines it should NOT run in parallel to it for any big distance. Electric
fencing should cross at right angles to the power lines. Distance from
ground to top of the fence should not exceed 3 meters near a power
line. This height limit applies up to a distance of 2 meters (power line
voltage up to 1000 Volts) or 15 meters (power line voltage over 1000
Volts) at ground directly under the outermost conductor of the power
line.
The fence or any part of it should be no closer to the overhead wires
than those values shown below:
Power Line Voltage Up to 1,000 Volts Clearance 3m
Power Line Voltage 1,000 to 33,000 Volts Clearance 4m
Power Line Voltage Over 33,000 Volts Clearance 8m
•
Electric fences intended for deterring birds, household pet
containment or training animals such as cows need only be supplied
from low output energisers to obtain satisfactory and safe
performance.
